:root {
  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);
  background-color: #242424;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  font-weight: 500;
  color: #646cff;
  text-decoration: inherit;
}
a:hover {
  color: #535bf2;
}

body {
  margin: 0;
  display: flex;
  place-items: center;
  min-width: 320px;
  min-height: 100vh;
}

h1 {
  font-size: 3.2em;
  line-height: 1.1;
}

button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: #1a1a1a;
  cursor: pointer;
  transition: border-color 0.25s;
}
button:hover {
  border-color: #646cff;
}
button:focus,
button:focus-visible {
  outline: 4px auto -webkit-focus-ring-color;
}

.card {
  padding: 2em;
}

#app {
  /* max-width: 1280px;
  margin: 0 auto; */
  padding: 2rem;
  text-align: center;
  flex: 1;
}

.user-image-bubble {
  display: inline-flex;
  align-items: center;
  background: #fffbe6;
  border: 2px solid #ffd700;
  border-radius: 24px;
  box-shadow: 0 2px 8px rgba(255, 215, 0, 0.15);
  padding: 8px 16px;
  margin-left: 8px;
  max-width: 220px;
}
.user-image-bubble img {
  border-radius: 12px;
  border: 1.5px solid #ffd700;
  max-width: 80px;
  max-height: 80px;
  margin-left: 8px;
}

html, body, #app {
  height: 100%;
  margin: 0;
  padding: 0;
}
.el-container {
  height: 100vh;
}
.el-aside {
  height: 100vh;
  display: flex;
  flex-direction: column;
}
.el-aside > div[style*='overflow-y: auto'] {
  flex: 1 1 auto;
  min-height: 0;
}
.el-main {
  position: relative;
  height: 100vh;
  padding-bottom: 80px !important; /* 留出输入区空间 */
  overflow: hidden;
  flex: 1 !important;
}
.chat-scroll-area {
  height: calc(100vh - 64px - 80px); /* 头部+底部输入区高度 */
  overflow-y: auto;
  padding-bottom: 16px;
}
.input-area-fixed {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  background: #fff;
  box-shadow: 0 -2px 8px #f0f1f2;
  z-index: 10;
}

/* 统一自定义滚动条样式 */
.history-scrollbar::-webkit-scrollbar,
.el-scrollbar__wrap::-webkit-scrollbar {
  width: 6px;
  background: transparent;
}

.history-scrollbar::-webkit-scrollbar-thumb,
.el-scrollbar__wrap::-webkit-scrollbar-thumb {
  background: rgba(0,0,0,0.15);
  border-radius: 4px;
}

.history-scrollbar::-webkit-scrollbar-track,
.el-scrollbar__wrap::-webkit-scrollbar-track {
  background: transparent;
}

.history-scrollbar::-webkit-scrollbar-button,
.el-scrollbar__wrap::-webkit-scrollbar-button {
  display: none;
  height: 0;
  width: 0;
}


@media (prefers-color-scheme: light) {
  :root {
    color: #213547;
    background-color: #ffffff;
  }
  a:hover {
    color: #747bff;
  }
  button {
    background-color: #f9f9f9;
  }
}
